path: root/gcc-4.9/gcc/config/mips/mips.opt

; Options for the MIPS port of the compiler
;
; Copyright (C) 2005-2014 Free Software Foundation, Inc.
;
; This file is part of GCC.
;
; GCC is free software; you can redistribute it and/or modify it under
; the terms of the GNU General Public License as published by the Free
; Software Foundation; either version 3, or (at your option) any later
; version.
;
; GCC is distributed in the hope that it will be useful, but WITHOUT
; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
; or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
; License for more details.
;
; You should have received a copy of the GNU General Public License
; along with GCC; see the file COPYING3.  If not see
; <http://www.gnu.org/licenses/>.

HeaderInclude
config/mips/mips-opts.h

EB
Driver

EL
Driver

mabi=
Target RejectNegative Joined Enum(mips_abi) Var(mips_abi) Init(MIPS_ABI_DEFAULT)
-mabi=ABI	Generate code that conforms to the given ABI

Enum
Name(mips_abi) Type(int)
Known MIPS ABIs (for use with the -mabi= option):

EnumValue
Enum(mips_abi) String(32) Value(ABI_32)

EnumValue
Enum(mips_abi) String(o64) Value(ABI_O64)

EnumValue
Enum(mips_abi) String(n32) Value(ABI_N32)

EnumValue
Enum(mips_abi) String(64) Value(ABI_64)

EnumValue
Enum(mips_abi) String(eabi) Value(ABI_EABI)

mabicalls
Target Report Mask(ABICALLS)
Generate code that can be used in SVR4-style dynamic objects

mmad
Target Report Var(TARGET_MAD)
Use PMC-style 'mad' instructions

mimadd
Target Report Mask(IMADD)
Use integer madd/msub instructions

march=
Target RejectNegative Joined Var(mips_arch_option) ToLower Enum(mips_arch_opt_value)
-march=ISA	Generate code for the given ISA

mbranch-cost=
Target RejectNegative Joined UInteger Var(mips_branch_cost)
-mbranch-cost=COST	Set the cost of branches to roughly COST instructions

mbranch-likely
Target Report Mask(BRANCHLIKELY)
Use Branch Likely instructions, overriding the architecture default

mflip-mips16
Target Report Var(TARGET_FLIP_MIPS16)
Switch on/off MIPS16 ASE on alternating functions for compiler testing

mcheck-zero-division
Target Report Mask(CHECK_ZERO_DIV)
Trap on integer divide by zero

mcode-readable=
Target RejectNegative Joined Enum(mips_code_readable_setting) Var(mips_code_readable) Init(CODE_READABLE_YES)
-mcode-readable=SETTING	Specify when instructions are allowed to access code

Enum
Name(mips_code_readable_setting) Type(enum mips_code_readable_setting)
Valid arguments to -mcode-readable=:

EnumValue
Enum(mips_code_readable_setting) String(yes) Value(CODE_READABLE_YES)

EnumValue
Enum(mips_code_readable_setting) String(pcrel) Value(CODE_READABLE_PCREL)

EnumValue
Enum(mips_code_readable_setting) String(no) Value(CODE_READABLE_NO)

mdivide-breaks
Target Report RejectNegative Mask(DIVIDE_BREAKS)
Use branch-and-break sequences to check for integer divide by zero

mdivide-traps
Target Report RejectNegative InverseMask(DIVIDE_BREAKS, DIVIDE_TRAPS)
Use trap instructions to check for integer divide by zero

mdmx
Target Report RejectNegative Var(TARGET_MDMX)
Allow the use of MDMX instructions

mdouble-float
Target Report RejectNegative InverseMask(SINGLE_FLOAT, DOUBLE_FLOAT)
Allow hardware floating-point instructions to cover both 32-bit and 64-bit operations

mdsp
Target Report Var(TARGET_DSP)
Use MIPS-DSP instructions

mdspr2
Target Report Var(TARGET_DSPR2)
Use MIPS-DSP REV 2 instructions

mdebug
Target Var(TARGET_DEBUG_MODE) Undocumented

mdebugd
Target Var(TARGET_DEBUG_D_MODE) Undocumented

meb
Target Report RejectNegative Mask(BIG_ENDIAN)
Use big-endian byte order

mel
Target Report RejectNegative InverseMask(BIG_ENDIAN, LITTLE_ENDIAN)
Use little-endian byte order

membedded-data
Target Report Var(TARGET_EMBEDDED_DATA)
Use ROM instead of RAM

meva
Target Report Var(TARGET_EVA)
Use Enhanced Virtual Addressing instructions

mexplicit-relocs
Target Report Mask(EXPLICIT_RELOCS)
Use NewABI-style %reloc() assembly operators

mextern-sdata
Target Report Var(TARGET_EXTERN_SDATA) Init(1)
Use -G for data that is not defined by the current object

mfix-24k
Target Report Var(TARGET_FIX_24K)
Work around certain 24K errata

mfix-r4000
Target Report Mask(FIX_R4000)
Work around certain R4000 errata

mfix-r4400
Target Report Mask(FIX_R4400)
Work around certain R4400 errata

mfix-rm7000
Target Report Var(TARGET_FIX_RM7000)
Work around certain RM7000 errata

mfix-r10000
Target Report Mask(FIX_R10000)
Work around certain R10000 errata

mfix-sb1
Target Report Var(TARGET_FIX_SB1)
Work around errata for early SB-1 revision 2 cores

mfix-vr4120
Target Report Var(TARGET_FIX_VR4120)
Work around certain VR4120 errata

mfix-vr4130
Target Report Var(TARGET_FIX_VR4130)
Work around VR4130 mflo/mfhi errata

mfix4300
Target Report Var(TARGET_4300_MUL_FIX)
Work around an early 4300 hardware bug

mfp-exceptions
Target Report Var(TARGET_FP_EXCEPTIONS) Init(1)
FP exceptions are enabled

mfp32
Target Report RejectNegative InverseMask(FLOAT64)
Use 32-bit floating-point registers

mfpxx
Target Report RejectNegative Mask(FLOATXX)
Follow the O32 FPXX ABI

mfp64
Target Report RejectNegative Mask(FLOAT64)
Use 64-bit floating-point registers

mflush-func=
Target RejectNegative Joined Var(mips_cache_flush_func) Init(CACHE_FLUSH_FUNC)
-mflush-func=FUNC	Use FUNC to flush the cache before calling stack trampolines

mfused-madd
Target Report Var(TARGET_FUSED_MADD) Init(1)
Generate floating-point multiply-add instructions

mabs=
Target RejectNegative Joined Enum(mips_ieee_754_value) Var(mips_abs) Init(MIPS_IEEE_754_DEFAULT)
-mabs=MODE	Select the IEEE 754 ABS/NEG instruction execution mode

mnan=
Target RejectNegative Joined Enum(mips_ieee_754_value) Var(mips_nan) Init(MIPS_IEEE_754_DEFAULT)
-mnan=ENCODING	Select the IEEE 754 NaN data encoding

Enum
Name(mips_ieee_754_value) Type(int)
Known MIPS IEEE 754 settings (for use with the -mabs= and -mnan= options):

EnumValue
Enum(mips_ieee_754_value) String(2008) Value(MIPS_IEEE_754_2008)

EnumValue
Enum(mips_ieee_754_value) String(legacy) Value(MIPS_IEEE_754_LEGACY)

mgp32
Target Report RejectNegative InverseMask(64BIT)
Use 32-bit general registers

mgp64
Target Report RejectNegative Mask(64BIT)
Use 64-bit general registers

mgpopt
Target Report Var(TARGET_GPOPT) Init(1)
Use GP-relative addressing to access small data

mplt
Target Report Var(TARGET_PLT)
When generating -mabicalls code, allow executables to use PLTs and copy relocations

mhard-float
Target Report RejectNegative InverseMask(SOFT_FLOAT_ABI, HARD_FLOAT_ABI)
Allow the use of hardware floating-point ABI and instructions

minterlink-compressed
Target Report Var(TARGET_INTERLINK_COMPRESSED) Init(0)
Generate code that is link-compatible with MIPS16 and microMIPS code.

minterlink-mips16
Target Report Var(TARGET_INTERLINK_COMPRESSED) Init(0)
An alias for minterlink-compressed provided for backward-compatibility.

mips
Target RejectNegative Joined ToLower Enum(mips_mips_opt_value) Var(mips_isa_option)
-mipsN	Generate code for ISA level N

mips16
Target Report RejectNegative Mask(MIPS16)
Generate MIPS16 code

mips3d
Target Report RejectNegative Var(TARGET_MIPS3D)
Use MIPS-3D instructions

mldc1-sdc1
Target Report Var(TARGET_LDC1_SDC1) Init(1)
Use ldc1/ldxc1 and sdc1/sdxc1 instruction

mllsc
Target Report Mask(LLSC)
Use ll, sc and sync instructions

mlocal-sdata
Target Report Var(TARGET_LOCAL_SDATA) Init(1)
Use -G for object-local data

mlong-calls
Target Report Var(TARGET_LONG_CALLS)
Use indirect calls

mlong32
Target Report RejectNegative InverseMask(LONG64, LONG32)
Use a 32-bit long type

mlong64
Target Report RejectNegative Mask(LONG64)
Use a 64-bit long type

mmcount-ra-address
Target Report Var(TARGET_MCOUNT_RA_ADDRESS)
Pass the address of the ra save location to _mcount in $12

mmemcpy
Target Report Mask(MEMCPY)
Don't optimize block moves

mmicromips
Target Report Mask(MICROMIPS)
Use microMIPS instructions

mmsa
Target Report Var(TARGET_MSA)
Use MIPS MSA Extension instructions

mmt
Target Report Var(TARGET_MT)
Allow the use of MT instructions

mmxu
Target Report Var(TARGET_MXU)
Allow the use of MXU instructions

mno-float
Target Report RejectNegative Var(TARGET_NO_FLOAT) Condition(TARGET_SUPPORTS_NO_FLOAT)
Prevent the use of all floating-point operations

mmcu
Target Report Var(TARGET_MCU)
Use MCU instructions

mno-flush-func
Target RejectNegative
Do not use a cache-flushing function before calling stack trampolines

mno-mdmx
Target Report RejectNegative Var(TARGET_MDMX, 0)
Do not use MDMX instructions

mno-mips16
Target Report RejectNegative InverseMask(MIPS16)
Generate normal-mode code

mno-mips3d
Target Report RejectNegative Var(TARGET_MIPS3D, 0)
Do not use MIPS-3D instructions

mpaired-single
Target Report Mask(PAIRED_SINGLE_FLOAT)
Use paired-single floating-point instructions

mr10k-cache-barrier=
Target Joined RejectNegative Enum(mips_r10k_cache_barrier_setting) Var(mips_r10k_cache_barrier) Init(R10K_CACHE_BARRIER_NONE)
-mr10k-cache-barrier=SETTING	Specify when r10k cache barriers should be inserted

Enum
Name(mips_r10k_cache_barrier_setting) Type(enum mips_r10k_cache_barrier_setting)
Valid arguments to -mr10k-cache-barrier=:

EnumValue
Enum(mips_r10k_cache_barrier_setting) String(load-store) Value(R10K_CACHE_BARRIER_LOAD_STORE)

EnumValue
Enum(mips_r10k_cache_barrier_setting) String(store) Value(R10K_CACHE_BARRIER_STORE)

EnumValue
Enum(mips_r10k_cache_barrier_setting) String(none) Value(R10K_CACHE_BARRIER_NONE)

mrelax-pic-calls
Target Report Mask(RELAX_PIC_CALLS)
Try to allow the linker to turn PIC calls into direct calls

mshared
Target Report Var(TARGET_SHARED) Init(1)
When generating -mabicalls code, make the code suitable for use in shared libraries

msingle-float
Target Report RejectNegative Mask(SINGLE_FLOAT)
Restrict the use of hardware floating-point instructions to 32-bit operations

msmartmips
Target Report Mask(SMARTMIPS)
Use SmartMIPS instructions

msoft-float
Target Report RejectNegative Mask(SOFT_FLOAT_ABI)
Prevent the use of all hardware floating-point instructions

msplit-addresses
Target Report Mask(SPLIT_ADDRESSES)
Optimize lui/addiu address loads

msym32
Target Report Var(TARGET_SYM32)
Assume all symbols have 32-bit values

msynci
Target Report Mask(SYNCI)
Use synci instruction to invalidate i-cache

mlra
Target Report Var(mips_lra_flag) Init(1) Save
Use LRA instead of reload

mtune=
Target RejectNegative Joined Var(mips_tune_option) ToLower Enum(mips_arch_opt_value)
-mtune=PROCESSOR	Optimize the output for PROCESSOR

muninit-const-in-rodata
Target Report Var(TARGET_UNINIT_CONST_IN_RODATA)
Put uninitialized constants in ROM (needs -membedded-data)

mvirt
Target Report Var(TARGET_VIRT)
Use Virtualization Application Specific instructions

mxpa
Target Report Var(TARGET_XPA)
Use eXtended Physical Address (XPA) instructions

mvr4130-align
Target Report Mask(VR4130_ALIGN)
Perform VR4130-specific alignment optimizations

mxgot
Target Report Var(TARGET_XGOT)
Lift restrictions on GOT size

modd-spreg
Target Report Mask(ODD_SPREG)
Enable use of odd-numbered single-precision registers

noasmopt
Driver

mclib=
Target RejectNegative Joined Var(mips_c_lib) ToLower Enum(mips_lib_setting) Init(MIPS_LIB_NEWLIB)
Specify the C library to use with this application
newlib      Use newlib
small       Use SmallLib
tiny        Use SmallLib optimised for size

Enum
Name(mips_lib_setting) Type(enum mips_lib_setting)
Known MIPS C libraries (for use with the -mclib= option):

EnumValue
Enum(mips_lib_setting) String(newlib) Value(MIPS_LIB_NEWLIB)

EnumValue
Enum(mips_lib_setting) String(small) Value(MIPS_LIB_SMALL)

EnumValue
Enum(mips_lib_setting) String(tiny) Value(MIPS_LIB_TINY)

msched-weight
Target Report Var(TARGET_SCHED_WEIGHT) Undocumented